Washington state troopers say one person was stabbed to death and at least three others were injured in an incident on Interstate 5 Wednesday afternoon. 

Trooper Rick Johnson said troopers responded to the Northbound I-5 south of Fed Way scales. 

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The incident involved four individuals in a black BMW. A male driver was killed from a stab wound, Johnson said. Another male was transported with "multiple gunshot wounds." 

Two others, a male and a female, were transported to area hospitals with stab wounds. 

This is a developing story. Check back for updates.